(19)
(11) EP 0 326 359 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
16.05.1990 Bulletin 1990/20

(43) Date of publication A2:
02.08.1989 Bulletin 1989/31

(21) Application number: 89300709.6

(22) Date of filing: 25.01.1989
(51) International Patent Classification (IPC)4B01D 37/02
(84) Designated Contracting States:
CH DE FR IT LI SE

(30) Priority: 26.01.1988 US 148607

(71) Applicant: PALL CORPORATION
Glen Cove, New York 11542 (US)

(72) Inventors:
  • Bhanot, Ashok Kumar
    Cortland New York 13045 (US)
  • Miller, John David
    Ithaca New York 14850 (US)

(74) Representative: Knott, Stephen Gilbert et al
MATHISEN, MACARA & CO. The Coach House 6-8 Swakeleys Road
Ickenham Uxbridge UB10 8BZ
Ickenham Uxbridge UB10 8BZ (GB)


(56) References cited: : 
   
       


    (54) Precoat filter element


    (57) A precoat filter element for a precoat filter unit comprises a flow distributor (60) and flow straightener (50). The flow distributor (60) surĀ­rounds a septum (10) and has openings through which liquid may flow. The proportion between the area of openings and the area of a wall of the flow distribuĀ­tor (60) may vary along the length of the septum (10) to distribute flow over the length of the septum (10) in a predetermined manner. A flow straightener is provided at the base of the septum (10) to reduce turbulence during precoat and filtration operations, and to reduce the occurrence of large flocs in precoat slurries during coating operations.







    Search report